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Topic: IR sensor question (Read 1160 times)

I would like to attach a camera to a servo and have the the servo rotate to allow the camera to follow an object in the room as the object moves. The object would need to be about 20-30 feet away. What is the best way to go about this? I was thinking of attathing an IR emitter to the object and have several detectors near the servo so that the servo will rotate to an angle depending on which detector "sees" the ir signal. Is it possible to have a stand alone LED sending a signal and willl they reach 30 ft? If there is a better way to do this please let me know.